Nesa Jafarzadeh

Nesa Jafarzadeh

Master of Science


Additional affiliations
September 2021 - July 2022
Khaje Nasir Toosi University of Technology
  • Master's Student
  • TA & RA
November 2020 - September 2022
Khaje Nasir Toosi University of Technology
Field of study
  • Inorganic chemistry
September 2016 - July 2020
Alzahra University
Field of study
  • Pure chemistry


Questions (15)
Are the most stable Chelate rings 5 ​​or 6 rings? For example, in the Co(OO)3 complex.
If we have a crystal with a coordination number of five, triangular bipyramidal(TBP) and square pyramid(SP) are expected. An intermediate state may also be obtained due to Barry's pseudo-rotation. But if the crystal data did not match any of the structures and the shape deviation was excessive, what structure should be reported? I also used the following formula, but it didn't work. What structure should I report?
•Pictures from reference, Chemistry of coordination compounds by M.M.Pouramini, N.Safari, K.Darzinezhad
What is the main difference between rhombic twist and trigonal twist and berry pseudo rotation? If we have a complex like [Co(en)3]3+, how can we understand the main rotation between isomers?
Can the HOMO orbital be higher in energy than the LUMO in the molecular orbital diagram? What is the reason for that? And can the LUMO orbital not be empty
Hello dear researchers By raising the pressure, does the size of the crystals get bigger? In general, how is the effect of pressure on the rate of crystal production?
I'm confused! In 13CNMR spectroscopy, is 13C nucleus used in the device? What exactly is the nature of the magnetic field produced by the device? From carbon 12 or 13? And does it only stimulate the 13C in the sample or does it also stimulate the 12C in our sample? (Of course, the abundance of 13C is much less than 12C)
How can solve this problem?
I mixed sodium azide with organotin complex(simple complex) and after that the solvent was evaporated by rotary.
After that I was added n-hexane to this oily liquid and in the next part I was evaporated solvent again and added diethylether.
In the flask I saw bubbles!!
What can we say?
Which gas was released from our mixture?
I thought a lot but I can't get any satisfactory result.
At the end I got solid but I want to know the nature of that gas.
The solvent of my reaction is acetone,
After hours under pressure solvent was removed and remain an oily liquid.
I washed it with about 1 cc or less dichloromethane to give a solution,
Then I added diethylether for solidified it.
but it didn't give solid to me.
I did it about 3 times,
It has remained up to now and again My friend can't solidified it unfortunately...
What do you think about my reaction?
What can I do?
In what way and when add alumina to our solution of complex in solvent? ( I understood my crystal was acidic with X-ray single crystallograghy and I don't want it. I want a new one with neutral character)
(For organoplatinum and organotin complexes)
How to crystallize complexes that are difficult to dissolve in strong solvents like methanol, Nitromethane, Dimethylformamide & etc ?
Can we dissolve them in hot solvent?(I know It's not good idea but What do you think about it?)
What will happen when hexaaquamanganese(II)ion is heated strongly?
What ions or complexes of manganese can prouduce MnO2(brown-black solid)as major product and brown gas as by-product?
How the bond between metal and CH3 is dissociate ?
Is acids can do that?
for example for organoplatinum or organochroumium or organotin complexes.